Group 1

Igneous Rocks

Rhyolite - felsic, fast cooling rate, extrusive, fine grain, contains quartz
Scorria - mafic, fast cooling rate, intrusive, fine grain, has bubbles
Granite - felsic, slow cooling rate, intrusive, coarse grain, contains quartz
Andesit - mafic, fast cooling rate, extrusive, fine grain , mostly light material, may contain quartz
Diorite - felsic, slow cooling rate, intrusive, coarse grain, mostly light material, may contain quartz
Basalt - mafic, fast cooling rate, extrusive, fine grain, mostly dark material
Pumice - felsic, fast cooling rate, extrusive, fine grain, floats in water, has bubbles
Gabbro - mafic, slow and fast cooling rate, intrusive, phorphyritic grain
Obsidian - felsic, fast cooling rate, extrusive, glassy grain, mostly dark material

Sedimentary Rocks

Conglomerate - clastic, poor sorting, contains round fragments
Coal - organic
Limestone - chemical, geode
Brecchia - clastic,poor sorting, stratification, contains angular fragments
Shale - clastic, well sorting, fossil, contains fragments
Chert - clastic, well sorting, stratification, scratches limestone
Sandstone - clastic, well sorting, stratification
Coquina - organic
Siltstone - clastic, well sorting, stratification

Metamorphic Rocks

Quartzite - non-foliated, heat
Marble - non-foliated, heat
Schist - foliated, pressur
Gneiss - foliated, pressure and heat
Slate - foliated, pressure